Drilling apparatus



G. H. GILIVIAN.

DRILLING APPARATUS.

APPLICATION man JAN. e. 1914.

Patented May13, 1919.

mmesses" g Invelizmror: w1/ z( @Orge aman, 550w/c1 Q. @WM by fil GEORGE H. GILMAN, OF CLAREMONT, NEW HAMPSHIRE, ASSIGNOR T0 CLAREMONT MACHINERY COMPANY, 0F CLAREMONT, NEW HAMPSHIRE, A CORPORATION OF MASSACHUSETTS.

DRILLING APPARATUS.

Specification of Letters Patent. Patented May 13, 1919.

Application led January 6, 1914. y Serial No. 810,663. t

To all whom t may concern:

Be it known that I, GEORGE H. GILMAN, a citizen of the United States, and a resident of Claremont, in the county of Sullivan and State of New Hampshire, have invented an Improvement in Drilling Apparatus, of which the following description, in connection with the accompanying drawings, is a speciiication, like characters on the drawings representing like parts.

Thisinveiition relates to earth boring ap paratus, and more especially to support-s for rock drilling machines of the type in which the drill is manipulated, held up to the work, and withdrawn therefrom under manual guidance and pressure exerted by the operato-r and applied directly to the ybody of the tool, as `distinguished from rigidly mounted drills which are fed by mechanical means.

My invention will be best understood by reference to the followingl specification when taken in connection with the accompanying drawings of one specic embodiment there- "of, while its scope will be moreparticularly pointed out in the appended claims;

In the drawings: Figure 1 is a rear elevation, partly in vertical section, of a drill and drill-mounting embodying my invention; l y

Fig.i 2 is a side elevation vof the same, showing, in fulland dotted lines, two positions assumed 'by the drill and its mounting in drrilling a hole, this view illustrating also, in a conventionalway, the Hoor, wall and roof of a portion of a mine.

Referring to the drawings 'and to the embodiment of my invention which I have selected for illustration, I have there shown an earth boring apparatus comprising a 4rock drill-ing machine 5and a support 6 upon which it is mounted in such a manner as to sustain the weight o-f the machine `and steady it in operation, while providing for free lateral movement ofthe drilling -machine and its support, accompanied by relative angular and vertical'movement of the machine .and support under the manual guidance 4of the operator whereby the drill bit may be caused to feed into the hole in a perfectly straight line and without danger of cramping, bending or breaking, due to changes which would other-Wise take place 'in angular, position ofthe drille'bit as it progresses into the drilled hele.:A

The drilling machine itself may be of any appropriate type, but herein is a familiar form of hammer type of-ro-ck 'drill having a `cylinder 7 within which a hammer piston 8 reciprocates and is provided with ,a reduced forwardl extension or hammer bar 9,

which delivers a succession of blows upon the inner end of a drill bit 10. The latter,

ing an automatic rotating mechanism, vand the drill bit itself may be of'twisted or helical formas shown. It will be understood, however, that other equivalent or substitute devices may be employed, and it will be unnecessary further to describe the drill bit and its chuck since these parts form no essential part of'my present invention.

Any appropriate manipulating means may be provided .whereby the operator may grasp and control the direction and feed of the drill, but hereinI have provided, at

'the rear of the cylinder, a 'pair of grasping handles 11 which extend laterally in opposite directions and serve as convenient han- ',dles to enable the operator to manipulate the tool. The 4l-atter may be provided as usual withl one or more, herein a pair, of tie-rods 12, 12. f

The -drill lsupport may be 'of any other construction suitable to perform its intended -functions, but herein comprises a vplurality .of vertically disposed and ltelescopi-cally arranged vmenrbers, herein three in number by preference, will be held in a chuck havdesignated by the numerals vv13, 111 and 15.

The member 13l may be terme-d a gooseneck,

'as it is herein provided with'a laterally 'Oifset portion 16 provided with'an eye 17 preferably placed in line with the axis of the shank of said member. Secured to this'eye is a dependinghook 18 hooked onto one of the side rods 12 .of 'the drilling machine so that the latter is freely pendant and is ca- 'pable of being swung vertically as well as horizontally.

portion with a set screw .19 one purpose of 4which is adjustably to secure the member 13" in .the desired position of vertical adjustment. Preferably the member 13 is provided with a lon 'tudinal groove 2O to receivethe pointe the set screw`19. Thevset serew wheathus engaging' me greet/e ,eerveeiie as a means for preventing the member 13 from turning about its vertical axis with relation vto the member 14. Ars a means for preventing` the member '13 from being Iaccidentally withdrawn from the member 14, the groove is made of such length as to' terminate at a point 21 somewhat above the llower end of the member 13.

The member 14 extends `within the mem-- ber 15, and the latter is herein tubular in form to receive a helical spring .22 which serves yieldingly or resiliently to support Vthe drill for a purpose which Ywill presently appear. The 'lower end .of the spring 22 rests on the bottom of the .chamber termed :Within `the member 15, while :the member 14 in turn rests upon the upper end of Athe spring. The member 1.4 isvherein provided with :a longitudinal groove 23 terminating at a point24above the bottom Yo `Said member, and this .groove receives a rset screw 25 which serves to prevent relative turning mov-ement .of :the members 14iand 15as Well as to prevent one from being accidentally withdrawn from nthe other, and, if desired, may serve further .as a means adjustably to secure the `two `members in various verti- Kcal relations .one 4to :the other. Usually, when `the apparatus is in use, however, ,the set screw 25 will .be loosenedjust suiiiciently to allow the member llto slide :freely within the .member v15 in order .that the spring may sustain .the weight of ,the parts supported thereby, including .the rock drill.

'ilhe lower-terminal portion .or the member 15 is ,preferably inthe torn-.1 of a 4spur l26 adapted ,to enter the ground andvsecure a irm hold therein in order that it ,may be ,prevented v.from .slipping laterally. kPreierably, galso, yas a means nfor limiting the reX- tent lto Iwhich vthe gspur can enter the Iground, there will .be provided a vertically adjustable stop, herein yn the form `of ,a collar 27 adjnstably secured .to the member 15 by means .of a setscrew 28..

Drills .of ,the type illustrated ,are commonly known as selfroftating hand hammer .drills and have :heretofore 'been supported and manipulated by Kthe operator Vwithout any` mechanical sup-port .or mounting. In .handling .such .'drill's, however., -it'has been found in practice very difficult .to F hold ,the drill ,steady and vkeep it .up .to fits work .in VLthe A proper manner. As a means for steadyin'g Het,

thezd-rilland sustaining Aits weight while tstill allowing theisame to be moved freely under the manual ,guidance of theoperator, ,I have provided ythe described `support Awhich possesses `also the advantage of being light .and

portable. In drilling .a hole, .the support is first s adjusted ,to tthelcorreot height by means of .the described adjusting devices Aand 'is so ,placed Las vto .incline rearwardly, that is to say,f-towajrd the v Opfrator who :stands at the Irear 'of "the inachine.` l'The opera-ton then placing the end of the drill bit against the wall oit' the mine, starts the machine into operation, exerting sufficient forward pressure to cause the drilll bit to be `fed into the hole as the cutting operation proceeds. It must be evident that, as the hole deepens, the drill support will swing forwardly from the position shown in full lines in Fig-2 to .the

position 1indicated in dotted lines, and that' during such movement the angular relation between the .tool and its support will .constantly change. It must also be evident thatv .owing to the :swinging motion of the support the tool would tend to ,move in the arc of .a .circle .and would :thus change .the angular relation ,of the drill bitwth respect to the drilled hole. In .order :to prevent this tendency, as the support A,Swings iorwardgly toward ya vertical position, the operator will exert a suflicient downwardlpressui'ze upon the lhandles 11 to` counteract .the tendency of the machine gto `depart froin'a straight,

.true course, .and atter the supporthas passed beyond ,aventical position, the operator will Ygradually diminish the downward pressure exerted upon the handles and thus Ipermit 'the machine to rise underthe influence .of

the Asupporting spring. 'It will loe evident that by a proper apportionment of the strength of the spring to the weight of the machine., and by A.a proper control upon the spring through the rgraspine; handles .of v.the machine., the 'lattermay lbefgcaused ,to travel in a straight, 1true course and the ld rill'bit ,fed into -the holle without cramping, bending, or breaking. 'T -he drill 'bit will, of course, Vbe withdrawn romthe hole by ,reversal of the .foregoing operation. f

By my improved 'jojo struction ,described above, it will be noted that a lighten-led and simplified device fis produced which is not only adapted ,to rough usageyhut which may hefvery ,cheaply manufactured, .aS .the parts are not only .simple in .form lout thenishing of the same is reduced `to a minimum; r:During the process of placing Jthe .drill in ,position forspotting or collaringa hole, it is also entirely unnecessary for ,the .drill `to be operating, kthereby y greatly facilitating ,thatoipto be readily .adjustable .to ,any Aheight `luider `Control of the operating handle, both of the operators hande nesesito? f .boing tree vdier :i130

use on the handle. Attention is also directed to the fact that through the provision of my improved off-set support and the flexible means for supporting the drill in pendant position thereon, the drill is normally balanced and the operator is also free to adjust the same in any manner desirable to enable him to maintain the alinement of the hole. It should also be observed that through the provision of my improved supporting connection adapted to be connected to the side rod of the drill, it is possible quickly to attach or detach a drill of standard construction to the supporting means, or if desired to shift the drill bodily longitudinally relative to its support. These and other advantages of my improvement will, however, be clearly apparent to those skilled in the art.

While I have herein shown and described one specific embodiment of my invention for illustrative purposes and have disclosed and discussed in detail the construction and arrangement incidental to one specific application thereof, it is to be understood that the invention is limited neither to the mere details or relative arrangement of parts nor to the specific embodiment herein shown, but that extensive deviations from the illustrative form or embodiment of the invention may be made without departing from the principles thereof.

Having thus described one embodiment of my invention what I claim and desire to secure by Letters Patent is:

1. An earth boring or rock drilling apparatus including a two-part support, a trans- Copies of this patent may be obtained for versely disposed tool pivotally mounted thereon, and resilient mechanical means operatively connected between the parts of said support for varying the effective height thereof' as the tool is moved longitudinally.

2. An earth boring or rock drilling apparatus including a telescopic support, a transversely disposed tool pivotally mounted thereon, and resilient mechanical means housed in said support for varying the elective height of said support as said tool is moved longitudinally.

3. An earth boring or rock drilling apparatus comprising a boring or drilling tool, an overhanging support therefor movable about one of its ends as a pivot', and a single pendant supporting connection pivotally connected to said support and slidably connected to said tool at a point between its ends.

4. An earth boring or rock drilling apparatus comprising, in combination, a boring or drilling tool, and supporting means therefor including a plurality of coaxially disposed telescopically arranged spring-pressed members, and a vertically adjustable off-set member carried by one of the same upon which said tool is pivoted with its pivot disposed a-t a point adjacent the vertical axial line of said members.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

GEORGE H. GILMAN.

Witnesses:

J. J. BURCHARD, G. W. BATEMAN.

ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

It is hereby certified that the assignee in Letters Patent No. 1,803,7 90, granted May 13, 1919, upon the application of George H. Gilman, of Claremont, New Hampshire, for an .improvement in Drilling Apparatus,7 Was erroneously described and speciiied as Claremont Machinery Company, of Clarement, New Hampshire, a corporation of Massachusetts, Whereas said assignee should have been described and speoied as Sullivan Machinery Uonipany, a corporation of Massachusetts, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 22d day of July, A. D., 1919.

R. F. l/VHITEHEAD,

Acting Commissioner of Patents.

[SEAL] Cl Z55-52. 

